:root {
  --brand: #0245F2;
  --ink: #303133;
  --muted: #767a82;
  --line: #e8eaee;
  --bg: #f5f6f8;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  font-size: 14px;
  line-height: 1.6;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.d-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.d-header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.d-brand { display: flex; align-items: center; gap: 10px; }
.d-brand img { height: 34px; display: block; }
.d-brand .name { font-size: 16px; font-weight: 700; color: var(--ink); }
.d-back { font-size: 13.5px; color: var(--muted); }
.d-back:hover { color: var(--brand); }

.d-wrap { max-width: 1120px; margin: 0 auto; padding: 20px 24px 60px; }

.d-crumb {
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
  border-radius: 6px;
  padding: 12px 18px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 18px;
}
.d-crumb a { color: var(--muted); }
.d-crumb a:hover { color: var(--brand); }
.d-crumb .sep { margin: 0 6px; color: #c7cad0; }
.d-crumb .current { color: var(--ink); }

.d-layout { display: grid; grid-template-columns: 240px 1fr; gap: 18px; align-items: start; }
@media (max-width: 760px) { .d-layout { grid-template-columns: 1fr; } }

.d-side-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 16px;
}
.d-side-title {
  padding: 14px 18px;
  font-size: 13px;
  color: var(--muted);
  background: var(--bg);
  font-weight: 600;
}
.d-side-item {
  display: block;
  padding: 13px 18px;
  border-top: 1px solid var(--line);
  color: var(--ink);
  font-size: 14px;
}
.d-side-item:hover { color: var(--brand); text-decoration: none; background: #fafbff; }
.d-side-item.active { background: var(--brand); color: #fff; }
.d-side-item.active:hover { color: #fff; }

.d-content {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 32px 36px;
}
.d-content h1 { font-size: 22px; margin: 0 0 8px; }
.d-meta { font-size: 12.5px; color: var(--muted); margin-bottom: 22px; display: flex; align-items: center; gap: 6px; }
.d-meta .tag { color: var(--brand); }
.d-content h2 {
  font-size: 16px;
  margin: 28px 0 12px;
  padding-left: 10px;
  border-left: 3px solid var(--brand);
}
.d-content p { margin: 0 0 12px; color: #4a4d52; }
.d-content ul, .d-content ol { margin: 0 0 12px; padding-left: 22px; color: #4a4d52; }
.d-content li { margin-bottom: 6px; }
.d-content table { width: 100%; border-collapse: collapse; margin: 10px 0 18px; font-size: 13.5px; }
.d-content table th, .d-content table td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; }
.d-content table th { background: var(--bg); font-weight: 600; }
.d-note {
  background: var(--bg);
  border-left: 3px solid var(--brand);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--muted);
  margin-top: 18px;
}
.d-contact { margin-top: 4px; }
.d-contact div { margin-bottom: 4px; }

.d-index-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.d-index-card {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 22px 24px;
  color: var(--ink);
}
.d-index-card:hover { border-color: var(--brand); text-decoration: none; box-shadow: 0 4px 16px rgba(2,69,242,.08); }
.d-index-card .no { font-size: 12px; color: var(--brand); font-weight: 700; letter-spacing: .04em; }
.d-index-card h3 { font-size: 15.5px; margin: 8px 0 8px; }
.d-index-card p { font-size: 13px; color: var(--muted); margin: 0; }

.d-footer { text-align: center; padding: 24px; font-size: 12px; color: var(--muted); }